Biology Chapter 2:

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Across
  1. 2. the building block of matter
  2. 3. a substance changes the rate of chemical reactions but it itself is not used up or affected.
  3. 6. an attraction between two atoms as a result of sharing or transferring valance electrons
  4. 7. the process by which particles in solution are evenly distributed throughout the solvent
  5. 8. a class of simple organic compound important in living things a source of both energy and structure
  6. 9. the tendency of energy to disperse and become less available to do work
  7. 14. a substance that can produce hydroxide ions or accept hydrogen ions
  8. 15. the smallest particle of a covalent bonded compound
  9. 17. a substances that is present before a chemical reaction
  10. 20. a class non polar compounds
  11. 21. acid a class of organic compounds that serve as the building blocks of protein.
  12. 22. the ability to do work
  13. 23. a substance that can produce hydrogen ions in a solution
  14. 25. a substance that binds to an enzyme and reduces it activity
  15. 26. a pure substance made up of only on e kind of atom
  16. 27. the substance formed during a chemical reaction.
  17. 28. change a change in a substance that does not change the identity of the substance
Down
  1. 1. the tendency of living organisms or parts to develop with distinct anterior and posterior
  2. 3. a naturally occurring compound, or a derivative of such a compound, with the general chemical formula Cx(H2O)y, made up of molecules of carbon (C), hydrogen (H), and oxygen (O)
  3. 4. a pure substance made from two or more elements that are chemically bonded.
  4. 5. the attraction between like particle with polar substances
  5. 10. a class of organic compounds that serve as building block of stored molecules
  6. 11. change a change in substance that results in one or more new substances being formed that have different physical and chemical properties.
  7. 12. physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
  8. 13. a measurement of average speed of the particles within a substance
  9. 16. the attraction of particles in one substance for particles in a different substance
  10. 18. compound a covalent bonded compound containing the element carbon
  11. 19. a naturally occurring catalyst usually protein
  12. 24. the process by which the solute is broken up into smaller pieces